Improvement in aspirators for preventing overheating of grain



me atrio.

Ieinem smc y i l'o` dll-gulaourit may coincer-ni:` i i,

" Beitknownthat I, THEoDoREr-L HOFFMANN, in

y, of Illinois, have invented a new and useful Improvement f l infAspirators,brhlreventing Grain or Cereals from Oyverheating when stored in bins, in warehouses, and ele- \"ators,'orin vesselswhen ontranspoit; and I'do hereby declare that the following is4 a full and exact descrip tion;thereofQi-eference being had to the accompanying y r drawing and to the letters of reference thereon.

j Figure 'li'einesents the aspiratorin `a perspective l Le ers a (to ,the pelforated tubes with the nonperforatedjointsw f i i l b the airftightI tube,'connected` air-tight with the T- r joii'iaandfleadingfi'ointhe `lower partto the top of thekgiain, either along the partitions in the bins or the bulkheadiu l vessels above the dec-k, i cycle c representsthe chamber for the grain.

` y JZ, by linear -inarksytlie height of the grain in bulk. f Figure 2 represents the sideview of the exhaustingzuparatus. l f Taft-he tube, whiclris"connected air-tight with the Rtnbe ibiul'ig. 1.` j l l y ufjlll Blepresent the inclosm'e of the fans of the ex-l llauster:` ,f y a, G theopening for blowing out the air drawn from the `grain byltheatnbesilain fig. 1 and the tube e in a vif I-I H thepulley foriiiicreasing motion. a 4lathermometer,i` The same is incased about three feetlong, with thesaile` above the grain, like those used'irrdistilleries. j-j y `The objeetof ,my invcutionisto providea conveny of `the grain toward theinterior, and thus extracting, ,l f `by aspnatim, the `warm Vand gmoisty' airf(tlie product f ot' spontaueousheating) accumulated there, by means of perforaazedtubes,` adjusted, according to the locality, near-` theV center part= of the grain in bulk, with the :udfot' anexausting"apparatus While' moist and f warmair is drawn out through thepertbrated tubes `Jair, the grainwill"bekcooled 0n the contrary, if a l cnr'rentoi air *isproduced ,by blowing fresh air into 1 `will `be condensed and absorbed. more or less'l'rom the y outer `part of the grain.

`. "forated tubes made of sheet" o1 galvanized iron, and is `joined,togetherwith nonlperforated elbows in a square "orelliptic form, accordingto the locality'. I i

rIrhe nspi" 'torshouldlbe pl; ccd in the grain so-that i 4 Lettqrs'ltent No. 100,628, Ia-ted March Si, 1870.

"l `'.Ihe` Schedule referred to in these Letters Patent and making part of the same,

" thev city ofBeardstown, inthe county of Cass, and State ien't and` ecoiioniicaljapparatus for producinga current y l of air from theatmosphere outside through the bull:`

by this operation, and'isreplaced by a current of fresh `the eenterof the moist or heated grain, the moisture The aspirator: eonsistsfin one or more. rows `of peritraenormla.v HOFFMANN, or BEAnnsrowN, ILLINOIS.

"F" mpnovsmnrrrINASPIRATORS For; PREVENTING OVERHEATING or GRAIN, acc.

the lower rowis about two and a half feet from the bottom and the sides of the bulk, and leaving a space of `five or six feet between each tube for the grain. The tubes can be placed either horizontal, when in bulks in warehouses or in vessels, or vertically,- when the gra-in is kept iu high narrow bins, in such a man- ,ner that .the double non-perforated T-jointtakes the structed on the principle of Schicles premium `ex- Y hauster. 'lheopening-of the center of the exhauster is connected'airtight with thctubes from the aspirator projecting outside of the grain. of the fans in the exhauster should be from twelve to fifteen hundred per minute.

lhe proportion of air disengaged by this operation is about as follows:

For two inches diameter in the clear-176 cubic feet per minute, or 10,560 per hour.

` Four inches diameter- 883 per minute, or- 52.080 -per hour.

` -Eightfinohes diameter3,531 per minute, or 211,-

800 cubic feet per hour.

The operations wit-l1 the aspirator on the grain might be limited to a few hours per day, according to the circumstances, and even discontiuuedfor several days when the atmosphere is damp and sultry.` The application ot' steam for the motivel power will facilitate the operation.

I disclaim the application of' perforated pipes, cylinders, perforated linings, false bottoms, or movable shafts'i'or the purpose of blowing artificial heated vor cooled air. into the grain.

Y lVha-t I claim as myiuvention, and desire to secure by, Letters Patent,vis

'lhe process of disengaging warm'and moist air from spontaneously-lieated grain, without the'aid of artificial heated or cooled air, when in bulk, either` in warehouses, biii"s,or vessels on transport, by means ot' perforated pipes vand exhaust-fan, substantially as herein shown and described and for the purpose set foi-th.

i THEODORE A. HOFFMANN. Witnesses: j i a HENRY Muslim,

HENRY E; DUMMER.

The revolutions 

